直播源码异步处理技术：处理用户请求的挑战

import asyncioimport aiohttpasync def fetch(url):    async with aiohttp.ClientSession() as session:        async with session.get(url) as response:            return await response.text()async def stream(url):    async with aiohttp.ClientSession() as session:        async with session.get_text() as content:            yield contentasync def run(url):    data = await fetch(url)    for line in data.split(""):        yield lineasync def main():    asyncio.get_event_loop().run_until_complete(run("省略......"))asyncio.get_event_loop().close()